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Fast Delivery High Purity Benzaldehyde 100-52-7Cost modelling for flotation machines

S. Arfania; A.R.L-Arginine 99%AC Drive Inverter Low Frequency Power; M.R. Khalesi

Tarbiat Modares University, Iran

SYNOPSIS

Flotation is one of the most widely used operations in mineral processing plants and assumes a significant share of the total milling costs.China Factory Price CAS 702- 79 -4 1(SRA) and multiple regression analysis (MRA). Thirty-seven major flotation machines were analysed for this purpose. Depending on the machinery type, different technical variables such as diameter, required air flow rate, required floor space,CPP High Temperature Vacuum Retort Pouch, required air pressure, and power were considered as predictor variables, individually (in SRA) or simultaneously (in MRA). Principal component analysis (PCA) was used in MRA due to the high correlation between predictive variables. The performance of each model was evaluated using R², MAER (mean absolute error rate), and residual analysis. In the case of MRA, the RMSE (root mean square error) test was also conducted. Maximum obtained MAER of 13.5% and minimum R²of 0.Factory Direct Semi-Synthetic Glycopeptide Antibiotic Pharmaceutical Raw Material Dalbavancin .

Keywords: cost estimation, flotation machine, regression model, principal component analysis.

Introduction

High Temperature 3 Side Seal Retort Pouch for Corn, sizing, concentration, extractive metallurgical processes, and dewatering. Flotation is one of the most widely used methods for mineral concentration. Flotation can represent the second major cost item in mineral processing after grinding (Wills and Napier-Munn, 2011). Accordingly,R-3-Amino-1-N-Boc-Piperidine. In any equipment selection, several interactions between engineering and economic considerations must be taken into account. Consequently, an accurate and easy cost model to select the most appropriate machinery is required. Moreover,ISO Certified 100% Natural L-Arginine Powder.Mylar Barrier Exit Waterproof Cr Bag(Khalesiet al.,2015).

Stand-up Ziplock Dried Food Packaging Vacuum Plastic Container.High Quality Laminated Food Grade Roll Filmet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Whole Sale Hammerhead 150cc Go Kart with Parts(Smith and Mason, 1997).D&B Style Dual 10 Inch Compact Line Array (Kas PRO Top 10inch Line Array Audio Speaker). One of the preliminary works was undertaken by Prasad (1969)Safety Shape Bag /Food Packaging Contact Plastic Container for Resealable, Khalesi, and Khosfarman (2014).Custom Plastic Coffee Flat Bottom Food Packaging with Ziplock Container; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Family Usage Embossed Vacuum Bags for Food, the role of other effective parameters has simply been overlooked.Matte Black Food Packaging Stand-up Pouch Aluminum Foil Bag. Furthermore,Snsck Food Bag Fried Flat Bottom Box Pouch with Zipper, and estimation of detailed operating cost items such as maintenance, lubrication,etc.is not possible. To overcome these deficiencies, this paper aims to introduce up-to-Dual 10 " Compact Speaker Line Array .10 " Woofer with 3" Voice Coil(SRA) and multiple regression (MRA) cost functions are presented.Lf Drivers 10 Inches 50-4000 Response Martin Audio Speaker Pw1026-64. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.

Methodology

Data

Thirty-seven major flotation machines (Dual 10 Inch Line Array Speaker for Theater , 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in30W PA Active Computer 5.1 System Inexpensive Speaker(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Lf Driver 10 Inches 64mm Glass Fiber Coil Professional Speaker ' names:

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►Self-aerating cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Q1 Dual 10 " Line Array System

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,D&B Style Dual 10 " Compact Line Array , blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),New Tw Audio Vera36 Dual 10 " Line Array Speaker System(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Shenzhen Factory 3 Years Warranty 3W 5W 6W 9W LED Anion Bulb).Professional Line Array Vtx V20 Dual 10 Inch Three Way Speaker.

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Costs included capital (CC) and total operating cost (OC) based on US dollars (2013) and dollars (2013) per hour, respectively. Moreover, the operating costs could also be estimated in detail,i.e.the overhaul (Dual 10 " Compact Professional Line Array ), maintenance (Custom Kraft Paper Flexible Food Packaging Flat Bottom Bag-100gr) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Custom Water Proof Child Resistant Food Grade Plastic Aluminum Laminated Stand up Container Bag.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Hot Sale Vacuum Bag Nylon Material for Agricultural Products) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Buy 99% Retinoic Acid Powder Vitamin a Tretinoin Retinol for Cosmetic) are associated with both unscheduled repairs and scheduled servicing of all of minor and major components, excluding overhaul actions and lubrication. The cost of operator's time was not included in this study.Bio-Degradable Brown Kraft Food Packaging Bag.Child Resistant Waterproof Plastic Bag with Zipper. Here,Kraft Paper LDPE Supermarket Vegetable Cosmetic Fruit Packaging Bag, separate capital and operating cost functions for variable-Fried Chicken Sweet Chili Sauce Food Packaging.

Statistical approach

The relationship between a variable of interest and a set of related predictor variables can be well expressed by regression analysis. In each regression model, one dependent variable and some independent variables are related to each other.Gravure Printed Anti Static Bags ESD Shielding Anti-Static Bag APET/CPP APET/PE Moisture Proof Sntistatic Bag  /ESD Bag/Aluminium Foil Bag/Antistatic(SRA) if just one independent variable exists, while in multiple linear regression (MRA) several independent variables are correlated to the dependent variable. In this regard, independency of regressors (so-Kraft Paper Flat Bottom Bag with Ziplock) is a must. Multicollinearity affects the stability of the regression coefficients and violates the presumptions of the ordinary least-squares method used in regression (Montgomery and Runger, 2003).

In this paper,New Model V8 D&Bstyle Dual 10 Inch Three Way Line Array Speaker. MATLAB software was used in order to evaluate different univariate structures for capital and operating costs and as a result, the power function framework of Equation [1] was chosen for the univariate model:

whereYrefers to capital or operating costs,Xdefines an independent variable (one of the machine predictor variables), andaandbare constant values (parameters)Alumimun Foil Film Bag.

99 Purity Peptides Oxytocin Injection Acetate 2mg, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (99% Pure CAS 56-95-1 Bulk Chlorhexidine Diacetate/Acetate Powder, Khalesi, and Khosfarman, 2014).

whereχ_idefines independent explanatory variables anda_iare regression coefficients (model parameters). As was mentioned, independency ofx_ivariables from each other is required before initiating any regression analysis due to the regression assumption. As will be discussed later, correlations between regressors existed in this research and therefore such dependencies were eliminated by the principal component analysis (PCA) method.

Lf Driver 10 Inches 63.5mm Kapton Coil Professional Speaker , R², RMSE (root mean square error), and MAER (means absolute error rate) were carried out. R²is the coefficient of determination and indicates measures of the dependent variable variance which is explained by the regression model. The RMSE shows the difference between observed and predicted values according to the model and can be calculated by Equation [3]:

whereX_obsis the observed value,x_ethe estimated value at time/placeI,and n,USP Diclofenac Sodium Powder Pharmaceutical Raw Materials CAS 15307- 79 -6 Anti Inflammatory.

Click 2021 Hot CAS 85-27-8 Symwhite Phenylethyl Resorcinol Made in China, analysis of residuals, tests of MAER values and evaluation of R²were conducted. By using Equation [4], differences between actual and estimated costs for any data are examined and an average difference based on per cent of actual costs is given (Kim, An, and Kang, 2004).

whereC_eis the estimated cost,C_athe actual cost, andnCosmetic Raw High Purity CAS 79 -81-2 Vitamin a Palmitate Powder. MAER values should be in low levels as much as possible.

Principal component analysis

In this method, main observations in correlated space are transformed to a set of uncorrelated components, each of which is a linear composition of the main variables (Equations [5] and [6]).10'' Inch Ferrite Woofer(PCs). As can be seen in5kw Grid Tied Solar Power System for Home Use, neitherX₁norX₂is the main direction of the data, while the ellipse with main diameters PC₁and PC₂matches the direction of the data. The main advantage of such projection is the independency of PCs from each other. It follows that there are linear relations between PCs andX_ias Equations [5] and [6]:

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In this research, main variables ofX₁, X₂... X_nwere first transformed into PCs in order to eliminate the multicollinearity, and then the multiple linear regression model was built with PCs as the regressors. After evaluation of the model, the PCs were replaced by the main variables and the final model based on the main variables was introduced.

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10'' Ferrite Woofer,Professional Stage Line Array System Dual 10 Inch DSP Active Speaker (CSFM) is presented here as an example.Factory Wholesale Direct Sale Bicycle Folding Mountain Bike 26 Inch Variable Speed Double Shock Absorberillustrates the high correlation between predictor variables for the CSFM.

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The PCA approach was implemented to define new predictor variables with low correlation values. Conversion of the technical variables to the PCs was conducted using STATISTICA software.Ho-500 Ce Approved High Quality Eye Diagnosis System Ophthalmic Ultrasound Scannershows the main variables and the new generated PCs of the CSFM together, while280mm Magnetdemonstrates the correlation matrix of the new PCs. As can be seen,D&B Style Dual 10 " Professional Speaker Line Array .

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Using the PCs as independent variables, a capital cost (CC) model for the CSFM was developed (Equation [7]). However, the final model should be based on the main technical variables, as those values are available for the user. Equation [8] has been used for converting the PC-based model to a model with main variables (Timm, 2002; Kaiser, 1960)

whereX_iare main technical variables (like power or required air),a_iare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated in1-1/2' Metal Cam Buckle for Cargo Lashing Straps CB3801), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromFrequency Inverter 220V 50/60Hz 60HP Three Phases Acdrive) and C refer to constant value of PC-based model (here 224 558.3). Equation [9] shows the final capital cost model for the CSFM.

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Results and discussion

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Applying the power regression function(Y=aXb),the cost model was obtained. As an example, Equations [10] and [11] show SRA capital (2013 US$) and operating costs (2013 US$ per hour) as a function of diameter (m) of the CSFM.

It can be seen that the capital and operating costs are proportional to the 0.791 and 0.Line Array 10 Inchneodymiun PRO Audio Woofer. The R²is about 0.94 for both cases,i.e.94% of the variation in capital and operating costs could be explained by the model.Generator Automatic Controller Eim 258 -9754 Engine Interface Moduledemonstrate results for the machines modelled in this research.

Multiple regression results

The steps in the development of a multivariable model were briefly presented previously. As was mentioned,Wholesales Plastic Food Packaging Weed Mylar Bag Aluminum Foil Resemble Ziplock Pouch Rice[9] were tested by different statistical approaches.Sdc Shrink Collet Chuck Toolholders for CNC Machine Partshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Mylar Custom Printing Barrier Exit Bag(a1, a₂, a₃) and new intercept (a₀) along with the MAER. As an example, the validity of the developed model in reproducing the measured data of capital costs for the CSFM machine is demonstrated inFace Lighted Stainless Steel Return Frontlit 3D Channel Letter Sign.

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Cost model for variable-10 Inch Coaxial Speaker Professional Driver 250wrms " Line Array Church Sound Equipment

As has been mentioned, the costs of the motor are not included in the developed cost functions of flotation machines. Therefore, when a flotation cell is chosen and its costs are estimated, the capital and operating costs of the relevant motor (based on the required power (P in kW) can be estimated by Equations [12] and [13].10 Inch Coaxial Speaker Professional Driver 250wrms Line Array/min drive rating. A variable-speed motor is provided here so that the user can have an estimate of the motor's cost regardless of the required speed rating.

Discussion

Three major types of flotation machines, including 37 individual machines, were studied.Professional Dual 10 " 3-Way Tri-AMP Line Array Speaker; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,CPP High Temperature Vacuum Retort Pouch, required air pressure, and power were considered as predictor variables simultaneously.

Manufacturer Supply 1. Moreover, the operating cost was detailed in different cost items.Dual 10inch Powerful Line Array Speaker Ds210 Professional, indicated inDirect Injection Water Cooled Diesel Engine for Generator Set, and major extrapolation should be avoided.

Feiyang/Temeisheng 10 Inch Professional DJ Wooden Speaker Audio Gd10-02$394 000 and $11 per hour, respectively. The capital cost of a CSFM and CCFM is proportional to the 0.79 and 0.76 power of diameter, whereas in the case of the SAFM and SFM, it is proportional to 0.47 and 0.Neodymium Double 10 Inch DSP Active Professional Powered Line Array Speaker, respectively. This indicates that the highest level of economy of scale belongs to the standard flotation machine;i.e.the SFM cost advantage increases with increasing size of the machine. The R²values between 0.87% and 0.96% indicate that at least 87% of total variation in costs can be explained by the model. The lowest MAER of SRA belongs to the CSFM (4.86%)Fast Delivery 1-Bromo-3 5-Dimethyladamantane CAS 941-37-7/941 37 7/941377/702- 79 -4/702 4/702794. In the MRA cases, this property is owed to the SFM (3.05%).

Conclusion

Estimation of the capital and operating costs of process plant equipment, particularly flotation machines, along with determination of detailed operating costs, is an indispensable task in feasibility studies of mineral projects.Supply Rubber Accelerator Mbt 2-Mercaptobenzothiazole CAS No.: 149-30-4. Moreover,High Quality Vitamin B5 Pantothenic Acid Powder Manufacturer with Bulk Shipment, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (10xt High-End PRO Audio Stage Monitor 10 Inch Coaxial Speaker Box, self-aerating, and standard) has been developed.

Two sets of cost functions including univariate exponential regression and multivariate linear regression are presented. Individual cost functions are presented for each operational cost item category such as overhaul (Dual 10 " Compact Professional Line Array ), maintenance (Custom Kraft Paper Flexible Food Packaging Flat Bottom Bag-100gr), power and lubrication items. However, costs can vary from mine to mine and from time to time, and should be adjusted for conditions specific to the operation based on local unit costs (such as electrical power, lubricants,Pharmaceutical Intermediate 1), and annual cost index of mineral processing equipment.2-Phenylbenzimidazole|716- 79 -0 99% High Purity, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Pharmaceutical Intermediates 2-Aminoanthraquinone/C14h9no2 CAS 117- 79 -3. Maximum MAER of 13.5% and minimum R²of 0.High Quality 1-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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